This is a note to let you know that I've just added the patch titled
dt: dt-extract-compatibles: Don't follow symlinks when walking tree
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
dt-dt-extract-compatibles-don-t-follow-symlinks-when.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit bb423f74c334bc9c216fc264f2a4635f61f3c9ec
Author: Nícolas F. R. A. Prado <nfraprado@xxxxxxxxxxxxx>
Date: Tue Nov 7 17:55:28 2023 -0500
dt: dt-extract-compatibles: Don't follow symlinks when walking tree
[ Upstream commit 8f51593cdcab82fb23ef2e1a0010b2e6f99aae02 ]
The iglob function, which we use to find C source files in the kernel
tree, always follows symbolic links. This can cause unintentional
recursions whenever a symbolic link points to a parent directory. A
common scenario is building the kernel with the output set to a
directory inside the kernel tree, which will contain such a symlink.
Instead of using the iglob function, use os.walk to traverse the
directory tree, which by default doesn't follow symbolic links. fnmatch
is then used to match the glob on the filename, as well as ignore hidden
files (which were ignored by default with iglob).
This approach runs just as fast as using iglob.
Fixes: b6acf8073517 ("dt: Add a check for undocumented compatible strings in kernel")
Reported-by: Aishwarya TCV <aishwarya.tcv@xxxxxxx>
Closes: https://lore.kernel.org/all/e90cb52f-d55b-d3ba-3933-6cc7b43fcfbc@xxxxxxx
Signed-off-by: "Nícolas F. R. A. Prado" <nfraprado@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20231107225624.9811-1-nfraprado@xxxxxxxxxxxxx
Signed-off-by: Rob Herring <robh@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/scripts/dtc/dt-extract-compatibles b/scripts/dtc/dt-extract-compatibles
index 2b6d228602e85..2f9d0eb59f5b7 100755
--- a/scripts/dtc/dt-extract-compatibles
+++ b/scripts/dtc/dt-extract-compatibles
@@ -1,8 +1,8 @@
#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-2.0-only
+import fnmatch
import os
-import glob
import re
import argparse
@@ -49,10 +49,20 @@ def print_compat(filename, compatibles):
else:
print(*compatibles, sep='\n')
+def glob_without_symlinks(root, glob):
+ for path, dirs, files in os.walk(root):
+ # Ignore hidden directories
+ for d in dirs:
+ if fnmatch.fnmatch(d, ".*"):
+ dirs.remove(d)
+ for f in files:
+ if fnmatch.fnmatch(f, glob):
+ yield os.path.join(path, f)
+
def files_to_parse(path_args):
for f in path_args:
if os.path.isdir(f):
- for filename in glob.iglob(f + "/**/*.c", recursive=True):
+ for filename in glob_without_symlinks(f, "*.c"):
yield filename
else:
yield f
